Flour-bolt-brush operating mechanism.



No. 645,455. Pat nted Maif..l 3-, I900. W. L. BURNER.

' FLOUR BQLT BRUSH OPERATING MECHANISM.

(Application filed m 13, 1899.)

(No Model.)

Mllllllllll v 5 rrnn STATES PATENT \VILLIAM L. BURNER, OF COLUMBUS,OHIO, ASSIGNOR TO TIIE CASE MANUFAOTURINGOOMPANY, OF SAME PLACE.

SFECIFICATION forming part of Letters'latent NO. 645,455, dated March13, 1900.

Original application filed February 1, 1898, $erlal No. 668,764. Dividedand this application filed May 13, 1899. Serial NOI 716,722. (No model.)

To CbZ-Z whom it may concern.-

a citizen of the United States, and a resident of Columbus, in thecounty of Franklin and State of Ohio, have invented certain new anduseful Improvements in Flour-Bolt-Brush Operating Mechanism, of whichthe following is a specification.

This application is a division of my application for Letters Patent forflour sifting, scalping, and grading machines filed February 1, 1898,Serial No. 668,7 64, wherein is described and claimed means for causinga re ciprocating movement of its cleaning-brush to be set up by thevibratory movement of the sieve, such means comprising a pawl carried byone of the relatively-moving parts, an elongated member carried by theother of said parts and upon which the pawl tracks and engages, so as totransmit the impelling movement from the sieve to the brush, and meanswhereby the pawl'reverses automatically, so as to assume alternately thetwo po- A sitions which result in its driving the brush in oppositedirections. I

My present invention relates to the means employed for reversing theposition of the pawl in carrying out the operation above described; andmyinvention consists in providing at the reversing-points, preferablythe points which are reached by the pawl as the brush attains the limitsof its opposite movements, trips which engage the pawl and throw it overinto the position which will return the brush in the direction oppositeto that of the movement which brought the pawl in contact with the trip.

My invention will be fully understood upon reference to the accompanyingdrawings, forming part of this specification, and in which- Figure 1 isa vertical transverse section illustrating the application of myinvention to a flour-sieve. Fig. 2 is a plan of the parts shown inFig. 1. Fig. 3 is a perspective view of a brush carrying theautomatically-revers ing pawl.

A represents a sieve provided with boltingcloth a.

B is a brush whose bristles '1) travel beneath the bolting-cloth a toclear the meshes of the latter. The sieve may be provided with wires a,stretched transversely to the travel of the brush for the purpose ofdislodging material accumulated in the brush.

0 0 represent the tracks upon which the brush B travels.

D is an impelling-pawl carried by the brush B and engaging with theelongated member d, which is carried by the sieve and upon which thepawl tracks, so that the vibratory motion of the sieve is imparted inone direction to the brush, while the brush by its inertia does not movewiththe sieve in the op posite direction. The member dis preferably inthe form of a rack having teeth 61, with which the pawl engages.

My present invention consists in mounting the pawl D reversibly upon thebrush-as, for instance, by having it project from a shaft 1, trunnionedin brackets 2and in provid ing said shaft with tripping-fingers 3 insuch positions that they will be respectively engaged by trips 4 atpoints which will cause the fingers to be engaged by the trips as thebrush reaches the limits of its movement. The trips 4 may be of anysuitable form, and they are preferably attached at opposite sidesc ofthe rack d, and the fingers 3 are in difierent vertical planes,'so thatthey will be respectively engaged by corresponding trips, so that whenthe reversal of the pawl has been effected by either finger and thebrush starts upon its return movement the other finger will pass thetrip without interference.

I desire it understood that Ido not limit myself to the precise detailsof the trips shown, as any construction which provides a trip forengagement with and reversal of the pawl as the brush reaches the limitsof its movement will be within the purview of my invention.

Having thus described my invention, the following is what I claim as newtherein and desire to secure by Letters Patent:

1. The combination, with a sieve and its cleaning-brush; of a device foreffecting a reciprocating movement of the brush, comprising animpelling-pawl and an elongated track with which the pawl engagescarried by the respective parts, and trips located at points to engageand. reverse the pawl as the brush approaches the limits of itsmovement; substantially as herein explained.

2. The combination, with a sieve and its cleaning-brush;'of a device foreffecting a reciprocating movement of the brush comprising animpelling-pawl carried by one of said parts, an eion gated track withwhich the pawl engages carried by the other of said parts, fingersconnected with the pawl, and trips which engage the respective fingersand reverse the pawl as the brush reaches the limits of its movement. i

3. The combination, with a sieve and its Witnesses:

C; N. SHOUGH, W. F. BILLINGSLEY.

